I stopped giving all chicken jerky after the FDA warning about tainted products from China causing illness.
So all his bloodwork was normal? That's good news. Did they check his urine, too?
Signs to watch for include decreased appetite; decreased activity; vomiting; diarrhea, sometimes with blood; and increased water consumption and/or increased urination.
The type of kidney failure associated with chicken jerky strips is called acquired Fanconi syndrome. Urine test results consistently show glucose and granular casts. Blood tests may show hypokalemia (low potassium), mildly increased liver enzymes, and acidosis. DogAware.com: Recalls that Affect Dogs